Overspeed Detection Function (Pr.374) - Mitsubishi Electric FR-F700PJ Instruction Manual

Air-conditioning inverter
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4.14.4 Overspeed detection function (Pr.374)

Inverter outputs are stopped when the motor speed exceeds the Pr.374 Overspeed detection level under IPM motor
control.
Parameter
Name
Number
374
Overspeed detection level
The above parameter can be set when Pr. 160 Extended function display selection = "0". (Refer to page 197)
..... Specifications differ according to the date assembled.
Selecting the IPM motor control by the parameter setting mode or Pr.998 IPM parameter initialization changes the Pr.374 setting
to "maximum motor frequency (motor speed)  105%". (For the details of parameter setting mode and Pr.998 IPM parameter
initialization, refer to page 83.)
NOTE
 An E.OS activation at a high frequency setting (a frequency higher than "maximum motor speed  105%") may damage the
inverter.
Operation setting at fault occurrence
Initial value
9999
Refer to page 346
Motor speed
Pr. 374
ALM
E.OS
Setting range
When the motor speed exceeds the
speed set in Pr.374, overspeed (E.OS)
0 to 400Hz
occurs, and the inverter outputs are
stopped.
9999
No function
to check the SERIAL number.
Coast to stop
Time
ON
Description
173
4

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